/**
 * IK 中文分词  版本 5.0.1
 * IK Analyzer release 5.0.1
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * 源代码由林良益(linliangyi2005@gmail.com)提供
 * 版权声明 2012，乌龙茶工作室
 * provided by Linliangyi and copyright 2012 by Oolong studio
 *
 */
package xiaoa.java.lucene.analyzer.lucene;

import java.io.Reader;
import java.io.StringReader;
import java.util.List;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.util.IOUtils;

import xiaoa.java.lucene.analyzer.cfg.Configuration;
import xiaoa.java.lucene.analyzer.core.ISegmenter;
import xiaoa.java.lucene.analyzer.dic.Dictionary;

/**
 * IK分词器，Lucene Analyzer接口实现
 * 兼容Lucene 4.0版本
 */
public final class IKAnalyzer extends Analyzer {

  private boolean useSmart;
  
  private Configuration cfg; 
  private Dictionary dic;

  public boolean useSmart() {
    return useSmart;
  }

  public void setUseSmart(boolean useSmart) {
    this.useSmart = useSmart;
  }
  
  // 分词器
  private List<ISegmenter> segmenters = null;

  /**
   * IK分词器Lucene  Analyzer接口实现类
   *
   * 默认细粒度切分算法
   */
  public IKAnalyzer() {
    this(false);
  }

  /**
   * IK分词器Lucene Analyzer接口实现类
   *
   * @param useSmart 当为true时，分词器进行智能切分
   */
  public IKAnalyzer(boolean useSmart) {
    super();
    this.useSmart = useSmart;
  }

  /**
   * 重载Analyzer接口，构造分词组件
   */
  @Override
  protected TokenStreamComponents createComponents(String arg0) {
      Reader reader=null;
      try{
          reader=new StringReader(arg0);
          IKTokenizer it = segmenters == null ? new IKTokenizer(reader ) : new IKTokenizer(reader ,  segmenters , cfg , dic );
          return new Analyzer.TokenStreamComponents(it);
      }finally {
          IOUtils.closeWhileHandlingException(reader);
      }
  }

  
  public IKAnalyzer (boolean useSmart , List<ISegmenter> segmenters , Configuration cfg , Dictionary dic ){
	  this.useSmart = useSmart;
	  this.segmenters = segmenters;
	  this.cfg = cfg;
	  this.dic = dic;
  }
  
}
